I recently bought a 1/2" 2 flute end mill bit, which fits in my table top drill press (1/2" chuck). I'm making perfectly flat bottomed holes (won't be seen in the final project) that go almost all the way through hard wood, so I can't use a forstner bit (because of the center tip). So far, the end mill bit has been working. However, I need to make a bunch of 3/4" diameter holes. That's been tedious since it means making 4-5 holes for each 3/4" hole (clamp, make hole, move a little, clamp, make hole....).
I can't seem to find an end mill bit that has a 1/2" shank but 3/4" cutting diameter. I did see this post about using a plunge router bit on a drill press though I haven't seen a router bit that looks like it'll cut a flat bottom. Also, from that post, people recommended a fast speed for the drill press, though the instructions on the press recommend slower speeds for hard wood. So I'm confused at that too.
Welcome any thoughts - thanks!
Edit: I also just ran across this cleaning router bit - could that work?